Chosen Solution
How do you change the A/C blower resistor that’s not under the hood 1983 Mercedes W123 240d ?
ttucker 2, type 3 AC system uses a circuit box behind the glove box with the resistor on the fender in the engine compartment, which you say you do not have. That means yours should be type 1 or 2 and the resistor is in the heater box inside the dash. Check on here and check image 115 and 122 for the location. This is what the part looks like.
